Selected Track Listener in Reactions

Most of the problems i have so far with trying to do my template for touchosc with CSS comes from the fact that when i try to use “selected_track” to create a listener in a reaction it seems that it only works for the currently selected track when the script is initialized.
For exemple creating a reaction with “Track’s name value has changed” (self.song().view.selected_track.add_name_listener) works fine but only for the track selected on init().

Is this a bug or the intented behaviour ?
would like to know.
Thanks!